I ran across this during my morning reading:
http://projects.puremagic.com/greylisting/whitepaper.html
of which there seems to be a good Postfix implementation
(Postfix is my MTA of choice):
http://isg.ee.ethz.ch/tools/postgrey/
So I'm seriously considering putting this on my server.
The effect on LUGOD would be:
(1) Virtually no spam. Mostly this is of interest to the
officers, as the mailing lists already require
registration in order to post; however spammers might
easily forge the FROM header to abuse this.
(2) Mail from first-time posters, or from those who post
less frequently than once per month, would likely be
delayed by an hour or so.
(3) This *might* allow me to eliminate the current blocking
of mail from dynamic IPs.
Comments?
-- Rod
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